Class: Steep::Server::DelayQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/steep/server/delay_queue.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(delay:) ⇒ DelayQueue

Returns a new instance of DelayQueue.



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# File 'lib/steep/server/delay_queue.rb', line 6

def initialize(delay:)
  @delay = delay

  @queue = Thread::Queue.new

  @thread = Thread.new do
    while (scheduled_at, proc = queue.pop)
      diff = scheduled_at - Time.now
      case
      when diff > 0.1
        sleep diff
      when diff > 0
        while Time.now < scheduled_at
          # nop
          sleep 0
        end
      end

      if proc.equal?(last_task)
        unless @cancelled
          proc[]
        end
      end
    end
  end
end

Instance Attribute Details

#delay ⇒ Object (readonly)

Returns the value of attribute delay.



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# File 'lib/steep/server/delay_queue.rb', line 4

def delay
  @delay
end

#last_task ⇒ Object (readonly)

Returns the value of attribute last_task.



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# File 'lib/steep/server/delay_queue.rb', line 4

def last_task
  @last_task
end

#queue ⇒ Object (readonly)

Returns the value of attribute queue.



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# File 'lib/steep/server/delay_queue.rb', line 4

def queue
  @queue
end

#thread ⇒ Object (readonly)

Returns the value of attribute thread.



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# File 'lib/steep/server/delay_queue.rb', line 4

def thread
  @thread
end

Instance Method Details

#cancel ⇒ Object 



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# File 'lib/steep/server/delay_queue.rb', line 33

def cancel
  @cancelled = true
  queue.clear()
end

#execute(&block) ⇒ Object 



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# File 'lib/steep/server/delay_queue.rb', line 38

def execute(&block)
  @last_task = block
  scheduled_at = Time.now + delay
  queue << [scheduled_at, block]
end